Patent for License

Mechanical, Variable Pressure Shock Absorber

This shock absorber mechanically adjusts its energy absorption as a function of the compression rate at the very beginning of the stoke

Overview

Current shock absorbers gradually increase the internal pressure during the stroke to absorb energy. If the compression rate is greater than the yield strength of the shock, the shock fails before it has absorbed a significant part of the energy. This shock, however, will adjust its pressure mechanically as a function of the initial compression rate. Thus, in the case of an airplane, if the landing is a gentle one, the small load is spread evenly over the entire stroke. This makes for an almost imperceptible landing. If the landing is one where the descent rate exceeds the capacity of the shock, the shock will pressurize to its maximum for the entire stroke and absorb as much energy as possible before bottoming out.

Primary Application of the Technology

An improved version has been designed that uses a hydraulic fluid that changes viscosity based on an applied electrical charge. Using a 3-ft stroke, the new gear should absorb up to 2000 fpm impacts with no damage to the aircraft, hull, or vehicle body or occupants. Far exceeding FAA standards for certified aircraft (7-10 fps (600 fpm)), these shocks are applicable to a multiplicity of equipage, vehicles and industry situations.